User's Manual

ENGLISH
CDRW
(CONT.)
APPENDIX
APPENDIX
20
• Onto this a special greenish tinged translucent layer is
applied. The substrate has already been provided with a
preformed track spiral into which the data will be written
during recording.
• On top of the green recording layer is a reflective gold layer
and a protective layer of plastic material.
The additional CD-R/RW area of a CD-R and -RW disc
The additional CD-R/RW area is divided into two areas:
• The Program Memory Area (PMA) which mainly contains the
track numbers of the tracks recorded with respective start and
stop points.
• The Program Calibration Area (PCA). Disc space for the
CD writer to calibrate the laser energy needed for recording
on the disc via a trial recording.
A CROSS-SECTION THROUGH A BLANK CD-R OR -RW DISC.
Next to the centre hole is an area for the mechanical clamping of
the disc in the player. Adjacent to this is the unrecorded area of
the blank CD-R or -RW disc.
7.5 mm
22.35 mm
max. 59 mm
max. 60 mm
Centre
hole
Area
for
mechanical
clamping
Blank area for recording
01_LAYOUT_GB 22-11-2000 09:21 Pagina 20